Include human, vehicle, and environmental factors and all
possible interactions

7.

Include identification of countermeasures

8.

Applicable to all powered two-wheel vehicle crashes

9.

Recommended to use sample sizes of at least 100 crashes
per sample area per year

10.

Include collection of concurrent exposure data

11.

Specify a minimum level and type of academic qualification,
motorcycle riding experience, and special investigation team
training

12.

Able to provide and audit path between the raw data and
the final results

13.

Reproducible from team to team

14.

Based on unbiased sampling, results, and interpretations

15.

Useful for comparison between sample areas and countries

16.

Based on a census of qualified motorcycle crashes meeting
sampling criteria

17.

Are from a sampling period covering 24 hours per day, 365
days per year

18.

Require standardized, minimum statistical analysis

19.

Result in final databases that have a common structure and
format

The Organization for Economic Cooperation and Development (OECD)
Common Methodology also requires analysis of the population-at-risk
to coincide with investigation of the crash population. Large-scale
data sources such as departments of motor vehicles can be surveyed
and compared to the population-at-risk identified through concurrent
exposure data collection. However, exclusive reliance on these
data sources will not define the true population-at-risk.